THRIFT-3452 .travis.yml: Migrating from legacy to container-based infrastructure
Client: Build
Patch: Nobuaki Sukegawa

Use "services: docker"

This closes #730
diff --git a/build/docker/centos/scripts/keepit b/build/docker/centos/scripts/keepit
new file mode 100644
index 0000000..cb885df
--- /dev/null
+++ b/build/docker/centos/scripts/keepit
@@ -0,0 +1 @@
+keep it